machines ISSN
|
|
- Christian Russell
- 6 years ago
- Views:
Transcription
1 Machines 2014, 2, 73-86; doi: /machines Article OPEN ACCESS machines ISSN Detailed Study of Closed Stator Slots for a Direct-Driven Synchronous Permanent Magnet Linear Wave Energy Converter Erik Lejerskog * and Mats Leijon Division for Electricity, Uppsala University Box 534, Uppsala , Sweden; mats.leijon@angstrom.uu.se * Author to whom correspondence should be addressed; erik.lejerskog@angstrom.uu.se; Tel.: ; Fax: Received: 3 December 2013; in revised form: 9 January 2014 / Accepted: 16 January 2014 / Published: 23 January 2014 Abstract: The aim of this paper is to analyze how a permanent magnet linear generator for wave power behaves when the stator slots are closed. The usual design of stator geometry is to use open slots to maintain a low magnetic leakage flux between the stator teeth. By doing this, harmonics are induced in the magnetic flux density in the air-gap due to slotting. The closed slots are designed to cause saturation, to keep the permeability low. This reduces the slot harmonics in the magnetic flux density, but will also increase the flux leakage between the stator teeth. An analytical model has been created to study the flux through the closed slots and the result compared with finite element simulations. The outcome shows a reduction of the cogging force and a reduction of the harmonics of the magnetic flux density in the air-gap. It also shows a small increase of the total magnetic flux entering the stator and an increased magnetic flux leakage through the closed slots. Keywords: wave energy converter; permanent magnet; closed stator slots; magnetic flux 1. Introduction In recent years, the demand of renewable energy has increased globally. One renewable energy resource that has not been contributing in a big scale to the world s energy production so far is wave energy. It has been estimated that wave energy could provide between 1-15 TWh globally [1]. The problem of keeping large and complex structures out at sea and the maintenance issue could partly be a reason why wave energy has not yet contributed greatly.
2 Machines 2014, 2 74 A comprehensive description of different wave energy converter technologies is found in [2]. Uppsala University has, with the goal to keep the complexity down, developed a direct driven wave energy converter; see Figure 1. The linear generator is placed inside a pressurized capsule on the seabed. A buoy on the surface then transfers the motion of the waves through a wire down to the generator, making the translator move in a linear motion up and down. A voltage is induced in the windings of the static stator when the translator (with surface mounted permanent magnets) moves in a vertical direction. The connection line is connected to a piston rod in the linear generator. The piston rod lifts the translator and keeps the capsule sealed by moving through a sealing device. Figure 1. The wave energy converter developed by Uppsala University. The generator studied in this paper is based on an eight sided stator-translator design i.e., the generator is octagon shaped. Previous studies have been done on an octagonal linear generator at Uppsala University but for a different power rating and slightly different design [3]. The translator is 1.5 times longer than the stator with a total number of 53 magnetic poles of which 35 of them are active at any time. Parameters of the generator can be seen in Table 1. Earlier generator prototypes developed and tested by Uppsala University were based on a four sided stator-translator design. Further details of these generator designs and offshore experiments can be found in [4 6].
3 Machines 2014, 2 75 Table 1. Parameters of the generator. Symbol Quantity Value B r remanent magnetic flux density 1.4 T H c coercive field intensity 1,115 ka/m h magnet height 11 mm w magnet width 47.3 mm g air-gap 3 mm w t tooth width 9.3 mm w s slot width 4 mm h t tooth height 9.5 mm h y Yoke height 42.8 mm h c translator core height 15 mm The purpose of this paper is to study the magnetic flux in the generator when the design of the stator is changed. Two different cases are studied, when the generator has open stator slots and when it has closed stator slots. In the closed slots case, the thickness of the slots, see Figure 2, is varied. It has been selected by keeping a magnetic flux density in the closed slots above 2 T, above the saturation knee point for the electrical steel in the B-H curve. By closing the stator slots, the axial force, i.e., cogging force, can be reduced [7 10] which is seen as one of the goals with closed stator slots. The cogging force gives rise to vibrations [11] in the wave energy converter which could affect the generator, the sealing, etc., negatively over time. The importance of minimizing potential problem areas arises from the maintenance issue with the generator kept at the seabed. Figure 2. One section of the linear generator showing the difference between: (a) open slot; and (b) closed slot. Another way to reduce the axial force would be to use a fractional winding. However, this winding configuration could be quite complex and time consuming to produce. With closed slots, an easier winding configuration could be used while still keeping the axial forces down. Moreover, the closed slots keep the winding protected inside the stator which is important both during production of the generator and during operation. The focus of the study is to analyze the wave shape of the magnetic flux density in the air-gap, which is directly linked to the cogging force, and the leakage flux through the stator slots.
4 Machines 2014, Finite Element Analysis The simulations are done with Ansys Maxwell finite-element analysis. Both a magneto-static and a transient analysis have been performed. The design speed of the generator simulation during transient analysis was set to 0.7 m/s with a time-step of 2 ms which corresponds to 1.4 mm each step. The model depth L i is 1.92 m. The magnetic flux through different parts of the design has been calculated with Stokes theorem. To calculate the cogging force due to slotting effects, the stress tensor of Maxwell has been integrated over the region of interest. Three different thicknesses of the stator slots are simulated, 0.5 mm, 1 mm and 2 mm; these are compared to the open slots type. Figure 2 illustrates the difference between open and closed slots and the thickness of the slots. The tooth width and the distance between two teeth for the open slots configuration are 11.5 mm and 4 mm. 3. Analytical Model of the Magnetic Flux through the Closed Slot The stator geometry is designed to guide the magnetic flux around the windings in the stator. When the slots are closed, the magnetic flux can find a short-cut between the teeth. This flux does not surround the windings and is called leakage flux. All magnetic flux that is not contributing to the induced voltage in the windings are leakage flux. By keeping the magnetic flux through the closed slots constant and decreasing the closed slots surface area, the magnetic flux density will increase and at a specific surface area the material in the closed slot will saturate. This means that an increase in magnetic field intensity, H, will not increase the induced magnetic flux density, B. The relative permeability of the material, μ r, will decrease with increasing magnetic field intensity and the reluctance, R, of the material increases. To keep the area of the closed slots in saturation, the permeability of the material will be close to that of air, which would make the closed slots very similar to the open slots case. By making sharp edges at the corner of the closed slots, see Figure 2, local saturation points are formed since the flux is concentrated to these areas [8]. These local saturation points are of importance in this paper and can be found in the result section. For a particular translator position see Figure 3, an equivalent magnetic circuit presented in Figure 4 has been derived for the machine by using Ampere s law. To calculate the peak flux through one closed slot the flux path of two teeth and two magnets are used. The flux from the other teeth will not contribute to the flux leakage through the closed slot at this position. In Figure 3, the flux lines for two teeth are illustrated. The flux lines surrounding the windings in the stator are the only ones contributing to the linkage flux; all others are more or less regarded as leakage flux. The flux leakage from the permanent magnets can be divided into two parts as illustrated in Figure 3, flux leakage between two magnets and flux leakage at the ends of the magnets. The losses are calculated by Equations (3) and (4). The equivalent magnetic circuit is shown in Figure 4. It is divided into five parts, the translator core, two magnets, air-gap and the stator core. The non-linear iron parts are highlighted with a thicker black line at the edge. The reluctance in the iron parts are described as R fe except for the closed slot which is
5 Machines 2014, 2 77 represented as RLcs where the L stands for leakage. RL and RL are the reluctance leakage paths for the magnets. n i are the number of nodes in the circuit where i = Figure 3. Illustrates two poles of the magnetic circuit and the flux lines between two teeth. Figure 4. Magnetic equivalent circuit.
6 Machines 2014, 2 78 The analytical model of this machine is divided into several parts and described in the following subsections Permanent Magnets The permanent magnet can be described as a magnetic potential source with the reluctance: R = µ 0 µ h rec w L i (1) where μ rec is the recoil permeability of the permanent magnet. The magnetic potential difference from the magnet can be calculated by the following equation: where Hc is the coercive field strength of the permanent magnet. The reluctance between the permanent magnets and the translator core, Equation (3), and between two magnets, Equation (4), can be calculated according to [12] as: where w f is the distance between two magnets. Equation (9) is valid for: R R L L U = H c h π = π g µ + 0 Li ln 1 h π = π g µ + 0 Li ln 1 wf (2) (3) (4) w f g < 2 (5) The magnetic potential difference from the magnet felt by the stator tooth and the closed slots vary with the position of the magnet and can be expressed as: U ( x) = H c π x dl sin wp (6) where x is the distance and w p is the pole width Closed Slots The flux through the closed slots is bounded to the position of the permanent magnets. Maximum flux through one slot is observed when the slot is positioned between two magnets while the minimum flux condition is encountered when the closed slot is positioned in the center of the magnet. However, when there is a minimum flux through the closed slot, much of the linkage flux will by-pass the slot. So a maximum in saturation in the corner of the closed slots would appear during this time. The reluctance of one closed slot can be calculated by using the following equation:
7 Machines 2014, 2 79 R Lcs = µ 0 hcs µ w cs cs L i (7) where μ cs is dependent on the B and H field non-linear behavior. By calculating the reluctance in the whole circuit, knowing the magnetic potential difference of the permanent magnet, the flux can be calculated through different parts. Moreover, by using the known surface, A, where the flux is passing through, the magnetic flux density can be calculated. The flux through one closed slot at a particular position is shown in Figure 3 and is calculated by: 2H cl µ 0Li φcs = αβ l1 + χ µ w 1 1 (8) where α, β and γ are given by 2l 2l g l4 α = + + µ w w µ w rec 2l µ w β 2 3 = l µ w 2 l 3 g µ w 2 χ = l 3 3 µ w l1 µ w 3 1 (9) (10) (11) and μ i i = 1, 2, 3, 4 are the relative permeability in different parts of the iron, l i is the flux path length and w i is the width of the flux path Non-Linear Permeability To calculate the non-linear behavior of the permeability, μ i, in different parts of the iron an expression of the B(H) needs to be derived. A modified Langevin expression can be used for this according to [13]. B i ( ) i H i = µ 0 H i + M s coth a H i H a (12) where H i and B i is the field intensity respective the flux density at a different parts of the magnetic circuit. M s is the saturation magnetization and a is a material dependent parameter. For each part in the iron the field intensity is iterated by Equation (12) and by knowing the field intensity and flux density the relative permeability is calculated. The values of the different μ i are then inserted into Equation (8) to calculate the magnetic flux and the magnetic flux density. 4. Results The results in Figures 5 and 6 present the magnetic flux density and the cogging force for different thicknesses of the closed slot. In Figures 7 9, the focus is on the magnetic flux in the stator. The flux linkage for one phase is presented in Figure 10. Figure 11 presents a snapshot of the magnetic flux
8 Machines 2014, 2 80 density distribution in the stator and in Figure 12 the analytical calculation of magnetic flux through the closed slot is presented. In Figure 5, the computed results, through FE simulation magnitude of the magnetic flux density in the middle of the air-gap, are plotted over one pole pair. In the magnetic flux density belonging to the open slots, there are larger harmonics compared to the closed slots. The harmonics also decrease when the closed slots have a larger thickness. Figure 5. Magnitude of the magnetic flux density in the middle of the air-gap: for open slots (dot); closed slots 1 mm thick (diamond); and closed slots 2 mm thick (cross), simulated over two magnetic poles. Cogging force integrated over one pole pair for three different cases simulated over 360 electrical degrees is presented in Figure 6, where the longitudinal end effects are ignored. Figure 6. Cogging force over one pole pair during 360 electrical degree for open slot (dot), closed slot 1 mm thick (diamond) and closed slot 2 mm thick (cross).
9 Machines 2014, 2 81 In Figure 7, a transient FE-simulation during 180 electrical degrees of the magnetic flux, entering the stator for one slot, simulated for three different cases. The closed slot cases show a slight increase in magnetic flux on entering the stator compared to the open slot case. Figure 7. Total flux entering the stator linking one slot for: open slot (dot); closed slot 1 mm (diamond); and closed slot 2 mm (cross), simulated over 180 electrical degrees. A transient FE-simulation of the magnetic flux through the entire slot and the air-gap is shown for three different stator geometries in Figure 8. The simulations are done over one pole pair. The magnetic flux reaches its peak when the closed slot is in-between two magnets. The open slot shows the lowest value of leakage flux, and it is increasing with the thickness of the closed slot. Figure 8. Magnetic flux leakage through one slot and in the air-gap for: open slot (dot); closed slot 1 mm thick (diamond); and closed slot 2 mm thick (cross), simulated over one magnetic pole pair. In Figure 9, three different stator geometries are simulated showing the flux through one closed slot for each case. The simulations are performed over one pole pair with thicknesses of 0.5 mm, 1 mm and 2 mm.
10 Machines 2014, 2 82 Figure 9. Magnetic flux through the closed slot at a thickness of 0.5 mm (dot), 1 mm (diamond) and 2 mm (cross), simulated over one magnetic pole pair. Figure 10, presents the flux linkage of the machine during no-load for three different thickness of the stator slots. Figure 10. Flux linkage for one phase of the machine during 180 electrical degrees for: open slot (dot); closed slot 1 mm thick (diamond); and closed slot 2 mm thick (cross). The induced magnetic flux density for a specific position of the stator for closed slots with 1 mm is shown in Figure 11. Bright areas indicate higher values and dark areas indicate lower values of the magnetic flux density. The magnetic flux density reaches its peak in between two magnets as indicated in Figures 8 and 9. The analytically derived model for the peak value of the flux through one closed slot is plotted with black dots in Figure 12. The thickness of the closed slot from 0.1 mm to 4.0 mm is shown on the x-axis. The leakage flux in miliweber through the slot is shown on the y-axis. The maximum values received from the FE-simulation are also inserted in the plot for three different thicknesses, 0.5 mm, 1 mm and 2 mm.
11 Machines 2014, 2 83 Figure 11. Induced magnetic flux density in stator, air-gap and back steel for 1 mm thickness of the closed slots. Figure 12. Peak magnetic flux through one closed slot for: 0.5 mm (diamond); 1 mm (triangle); and 2 mm (square) with FE-analysis compared with analytical results from 0.1 mm to 4 mm in dots. 5. Discussion The results indicate that closed slots afford some benefit regarding the magnetic flux density in the air-gap and the cogging force, compared to the open slots design. However, the advantages need to be superior to that of the increased flux leakage through the closed slots and the decrease of flux linkage. By closing the slot, the magnetic flux entering the stator slightly increases with the thickness of the slot, see Figure 7. Comparing open slot and closed slot with 2 mm thickness, the peak value of the flux entering the stator is increased by about 2.4%. The results presented in Figure 5 clearly show that the slot harmonics in the magnetic flux density are reduced when using closed slots. Some harmonic content is still present because of the low relative permeability of the closed slots. The difference between 1 mm and 2 mm are distinguished because we
12 Machines 2014, 2 84 have higher saturation and lower permeability at 1 mm than 2 mm. The flux density peaks in the open slots case, have higher flux density than the closed slots due to fringing. In Figure 6, the cogging force is plotted on ignoring the longitudinal end effects which occur when a magnet slips in and out of the stator. From Figure 6, it is clear that the peak cogging force is reduced with increasing thickness of the closed slot. Looking at Figure 9, one can see that the peak of the leakage flux occurs when one closed slot is positioned in between the two magnets. All magnetic flux shown in Figures 8 and 9 does not contribute to the leakage flux; at different positions some of the flux uses the closed slots to link around the winding. Comparing Figures 8 and 9, the leakage flux through the closed slot contributes about 40% of the total leakage flux through the slot. By increasing the thickness of the closed slots, the harmonics in the flux density are reduced, but the leakage flux is increased. An optimization process between these two is needed to find the optimal size of the closed slots. The flux linkage presented in Figure 10 decreases with the increased thickness of the closed slot. The rise in magnetic flux entering the stator for closed slots does not contribute to the flux linkage of the machine which would have an impact on the induced voltage of the machine. One way to keep the same flux linkage in the machine for the open and closed slots cases could be to change the size of the permanent magnets. In Figure 11, the magnetic flux density is plotted. Looking at the bright areas, the flux density is high when the closed slots are positioned in between two magnets. The flux density also has peak values at the corners when it is positioned in the middle of the magnet. This is due to the flux being forced through the corner. Due to the limited value of the magnetic potential difference from the permanent magnets, the relative permeability will converge to a value above the value of air. In this magnetic circuit it will converge to a value of about 16. The magnetic flux versus closed slot thickness shown in Figure 12 appears to be linear. This is due to the magnetic potential and the reluctance decrease caused by the thickness of the closed slot, where the reluctance decreases approximately with the square of the magnetic potential difference. The maximum difference between the simulated results and the analytical model is below 1%, which indicates a good agreement between the two models. The cogging force is related to the magnetic flux density in the air-gap. By reducing the slot harmonics in the flux density, the cogging force could also be reduced [14]. Earlier designs to reduce the cogging force in the generator developed by Uppsala University used fractional winding, by breaking the symmetry of the magnet attracting to the stator teeth [15]. The fractional winding technique and slot shape optimization on linear permanent magnet machines has also been investigated in [16]. This winding results in a lower flux linkage, hence a lower phase voltage from the generator. For closed slots there are no teeth but there will still be a change in the reluctance. Moreover, there will be leakage flux through the closed slots. Further studies of the forces that influence the generator would be of high interest. The transient FE-simulations are very time consuming but by expanding the analytical model it could become more efficient. Further, by studying the forces, the vibrations in the generator could be analyzed, which are crucial for designing the air-gap width and the design of the seal in order to keep the generator sealed. Another possibility in an expanded model would be to study how the generator
13 Machines 2014, 2 85 behaves during different load cases and how the saturation of the closed slot affects the inductance of the generator. 6. Conclusions The results presented in this paper show that the magnetic flux density harmonics in the air-gap is reduced for closed stator slots compared to open stator slots. It also shows that the cogging force is reduced by using closed slots. The increase in total magnetic flux entering the stator for closed slots does not increase the flux linkage in the machine during no-load. In order to achieve the same induction, the size of the magnets needs to be increased. The increase in permanent magnetic material corresponds to flux linkage in the closed slots. However, the purpose of a closed slot is primarily mechanical and electromagnetic. The magnetic flux through the closed slots increases with an increased thickness of the closed slots. The FE-simulations results show a good agreement with the analytically derived expression. This indicates that the model could be used to further study the generator. Acknowledgments This work was supported by the Swedish Research Council under Grant no The Authors also would like to thank Cecilia Boström, Ling Hai and Antoine Baudoin for reading and discussing the paper. Conflicts of Interest The authors declare no conflict of interest. References 1. Thorpe, T.W. A Brief Review of Wave Energy; ETSU Report R-120 for the UK Department of Trade and Industry; Harwell Laboratory, Energy Technology Support Unit: London, UK, Falcão, A.F.O. Wave energy utilization: A review of the technologies. Renew. Sustain. Energy Rev. 2010, 4, Ivanova, I.A.; Ågren, O.; Bernhoff, H.; Leijon, M. Simulation of wave-energy converter with octagonal linear generator. IEEE J. Ocean. Eng. 2005, 30, Danielsson, O.; Leijon, M.; Sjöstedt, E. Detailed study of the magnetic circuit in a longitudinal flux permanent-magnet synchronous linear generator. IEEE Trans. Magn. 2005, 41, Waters, R.; Stålberg, M.; Danielsson, O.; Svensson, O.; Gustafsson, S.; Strömstedt, E.; Eriksson, M.; Sundberg, J.; Leijon, M. Experimental results from sea trials of an offshore wave energy system. Appl. Phys. Lett. 2007, 90, : :3. 6. Rahm, M.; Svensson, O.; Boström, C.; Leijon, M. Experimental results from the operation of aggregated wave energy converters. IET Renew. Power Gener. 2012, 6, Cruise, R.J.; Landy, C.F. Reduction of Cogging Force in Linear Synchronous Motor. In Proceedings of the Africon IEEE 1999, Cape Town, South Africa, 28 September 1 October 1999; Volume 2, pp
14 Machines 2014, An, Z.; Wang, J.; Liu, W.; Tong, W.; Tang, R. Study on Direct-Drive Permanent Magnet Synchronous Generator Using Closed Slots. In Proceedings of the Power and Energy Engineering Conference (APPEEC), Chengdu, China, March 2010; pp Chun, J.S.; Jung, H.K.; Yoon, J.S. Shape optimization of closed slot type permanent magnet motors for cogging torque reduction using evolution strategy. IEEE Trans. Magn. 1997, 33, Faiz, J.; Ebrahimi-salari, M.; Shahgholian, G.H. Reduction of cogging force in linear permanent-magnet generators. IEEE Trans. Magn. 2010, 46, Kimoulakis, N.M.; Kladas, A.G.; Tegopoulos, J.A. Cogging Force minimization in a coupled permanent magnet linear generator for sea wave energy extraction applications. IEEE Trans. Magn. 2009, 45, Qu, R.; Lipo, T.A. Analysis and modeling of air-gap and zigzag leakage fluxes in a surface-mounted permanent-magnet machine. IEEE Trans. Ind. Appl. 2004, 40, Thelin, P. Calculation of the Airgap Flux Density of PM Synchronous Motors with Buried Magnets Including Axial Leakage and Teeth Saturation. In Proceedings of the 9th International Conference on Electrical Machines and Drives 1999, Canterbury, New Zealand, 1 3 September 1999; Volume 468, pp Ashabani, M.; Abdel-Rady, Y.; Mohamed, I.; Milimonfared, J. Optimum design of tubular permanent-magnet motors for thrust characteristics improvement by combined Taguchi-neural network approach. IEEE Trans. Magn. 2010, 46, Ivanova, I.; Ågren, O.; Bernhoff, H.; Leijon, M. Simulation of Cogging in a 100 kw Permanent Magnet Octagonal Linear Generator for Ocean Wave Conversion. In Proceedings of the International Symposium on Underwater Technology, 2004, Taipei, Taiwan, April 2004; pp Di Stefano, R.; Marignetti, F. Tubular linear permanent magnet actuator with fractional slots. IEEE J. Ind. Appl. 2012, 1, by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (
SPOKE-TYPE permanent magnet (PM) rotors are typically
Magnetic End Leakage Flux in a Spoke Type Rotor Permanent Magnet Synchronous Generator Petter Eklund, Jonathan Sjölund, Sandra Eriksson, Mats Leijon Abstract The spoke type rotor can be used to obtain
More informationKeywords: Electric Machines, Rotating Machinery, Stator faults, Fault tolerant control, Field Weakening, Anisotropy, Dual rotor, 3D modeling
Analysis of Electromagnetic Behavior of Permanent Magnetized Electrical Machines in Fault Modes M. U. Hassan 1, R. Nilssen 1, A. Røkke 2 1. Department of Electrical Power Engineering, Norwegian University
More informationAnalytical Solution of Magnetic Field in Permanent-Magnet Eddy-Current Couplings by Considering the Effects of Slots and Iron-Core Protrusions
Journal of Magnetics 20(3), 273-283 (2015) ISSN (Print) 1226-1750 ISSN (Online) 2233-6656 http://dx.doi.org/10.4283/jmag.2015.20.3.273 Analytical Solution of Magnetic Field in Permanent-Magnet Eddy-Current
More informationDoubly salient reluctance machine or, as it is also called, switched reluctance machine. [Pyrhönen et al 2008]
Doubly salient reluctance machine or, as it is also called, switched reluctance machine [Pyrhönen et al 2008] Pros and contras of a switched reluctance machine Advantages Simple robust rotor with a small
More informationExperimental Assessment of Unbalanced Magnetic Force according to Rotor Eccentricity in Permanent Magnet Machine
Journal of Magnetics 23(1), 68-73 (218) ISSN (Print) 1226-175 ISSN (Online) 2233-6656 https://doi.org/1.4283/jmag.218.23.1.68 Experimental Assessment of Unbalanced Magnetic Force according to Rotor Eccentricity
More informationMODELING surface-mounted permanent-magnet (PM)
Modeling of Axial Flux Permanent-Magnet Machines Asko Parviainen, Markku Niemelä, and Juha Pyrhönen Abstract In modeling axial field machines, three dimensional (3-D) finite-element method (FEM) models
More informationPower density improvement of three phase flux reversal machine with distributed winding
Published in IET Electric Power Applications Received on 4th January 2009 Revised on 2nd April 2009 ISSN 1751-8660 Power density improvement of three phase flux reversal machine with distributed winding
More informationA New Moving-magnet Type Linear Actuator utilizing Flux Concentration Permanent Magnet Arrangement
342 Journal of Electrical Engineering & Technology Vol. 7, No. 3, pp. 342~348, 2012 http://dx.doi.org/10.5370/jeet.2012.7.3.342 A New Moving-magnet Type Linear Actuator utilizing Flux Concentration Permanent
More informationCHAPTER 3 INFLUENCE OF STATOR SLOT-SHAPE ON THE ENERGY CONSERVATION ASSOCIATED WITH THE SUBMERSIBLE INDUCTION MOTORS
38 CHAPTER 3 INFLUENCE OF STATOR SLOT-SHAPE ON THE ENERGY CONSERVATION ASSOCIATED WITH THE SUBMERSIBLE INDUCTION MOTORS 3.1 INTRODUCTION The electric submersible-pump unit consists of a pump, powered by
More informationCOGGING torque is one of the major sources of vibration
IEEE TRANSACTIONS ON MAGNETICS, VOL. 47, NO. 7, JULY 2011 1923 Cogging Torque of Brushless DC Motors Due to the Interaction Between the Uneven Magnetization of a Permanent Magnet and Teeth Curvature S.
More informationTubular Linear Permanent Magnet Actuator with Fractional Slots
IEEJ Journal of Industry Applications Vol.1 No.3 pp.17 177 DOI: 10.1541/ieejjia.1.17 Paper Tubular Linear Permanent Magnet Actuator with Fractional Slots oberto Di Stefano Non-member, Fabrizio Marignetti
More information1. Introduction. (Received 21 December 2012; accepted 28 February 2013)
940. Magnetic equivalent circuit model of surface type fractional-slot permanent magnet synchronous generator Y. Oner, I. enol,. Bekiroglu, E. Aycicek Y. Oner 1, I. enol 2,. Bekiroglu 3, E. Aycicek 4 Yıldız
More informationProposal of short armature core double-sided transverse flux type linear synchronous motor
Proposal of short armature core double-sided transverse flux type linear synchronous motor Shin Jung-Seob a, Takafumi Koseki a and Kim Houng-Joong b a The University of Tokyo, Engineering Building #2 12F,7-3-1
More informationRELUCTANCE NETWORK MODEL OF A PERMANENT MAGNET TUBULAR MOTOR
Andrzej Waindok Bronisław Tomczuk DOI 0.55/ama-207-0029 RELUCTANCE NETWORK MODEL OF A PERMANENT MAGNET TUBULAR MOTOR Andrzej WAINDOK * Bronisław TOMCZUK * * Opole University of Technology Department of
More informationSCIENCE CHINA Technological Sciences. Nonlinear magnetic network models for flux-switching permanent magnet machines
SCIENCE CHINA Technological Sciences Article March 2016 Vol.59 No.3: 494 505 doi: 10.1007/s11431-015-5968-z Nonlinear magnetic network models for flux-switching permanent magnet machines ZHANG Gan, HUA
More informationBasics of Permanent Magnet - Machines
Basics of Permanent Magnet - Machines 1.1 Principles of energy conversion, force & torque 1.2 Basic design elements 1.3 Selection of PM-Machine topologies 1.4 Evaluation and Comparison Permanent Magnet
More informationDESIGN AND ANALYSIS OF AXIAL-FLUX CORELESS PERMANENT MAGNET DISK GENERATOR
DESIGN AND ANALYSIS OF AXIAL-FLUX CORELESS PERMANENT MAGNET DISK GENERATOR Łukasz DR ZIKOWSKI Włodzimierz KOCZARA Institute of Control and Industrial Electronics Warsaw University of Technology, Warsaw,
More informationThird harmonic current injection into highly saturated multi-phase machines
ARCHIVES OF ELECTRICAL ENGINEERING VOL. 66(1), pp. 179-187 (017) DOI 10.1515/aee-017-001 Third harmonic current injection into highly saturated multi-phase machines FELIX KLUTE, TORBEN JONSKY Ostermeyerstraße
More informationANALYTICAL PREDICTION OF PERMANENT MAGNET LINEAR GENERATOR FOR WAVE ENERGY CONVERSION SYSTEM IN MALAYSIA OCEAN. Published online: 20 July 2018
Journal of Fundamental and Applied Sciences ISSN 1112-9867 Research Article Special Issue Available online at http://www.jfas.info ANALYTICAL PREDICTION OF PERMANENT MAGNET LINEAR GENERATOR FOR WAVE ENERGY
More informationDESIGN AND COMPARISON OF FIVE TOPOLOGIES ROTOR PERMANENT MAGNET SYNCHRONOUS MOTOR FOR HIGH- SPEED SPINDLE APPLICATIONS
Special Issue on Science, Engineering & Environment, ISSN: 186-990, Japan DOI: https://doi.org/10.1660/017.40.0765 DESIGN AND COMPARISON OF FIVE TOPOLOGIES ROTOR PERMANENT MAGNET SYNCHRONOUS MOTOR FOR
More informationDevelopment of a Double-Sided Consequent Pole Linear Vernier Hybrid Permanent-Magnet Machine for Wave Energy Converters
Development of a Double-Sided Consequent Pole Linear Vernier Hybrid Permanent-Magnet Machine for Wave Energy Converters A. A. Almoraya, N. J. Baker, K. J. Smith and M. A. H. Raihan Electrical Power Research
More informationDesign Optimization and Development of Linear Brushless Permanent Magnet Motor
International Journal of Control, Automation, and Systems Vol. 1, No. 3, September 3 351 Design Optimization and Development of Linear Brushless Permanent Magnet Motor Myung-Jin Chung and Dae-Gab Gweon
More informationLevitation and Thrust Forces Analysis of Hybrid-Excited Linear Synchronous Motor for Magnetically Levitated Vehicle
564 Journal of Electrical Engineering & Technology Vol. 7, No. 4, pp. 564~569, 2012 http://dx.doi.org/10.5370/jeet.2012.7.4.564 Levitation and Thrust Forces Analysis of Hybrid-Excited Linear Synchronous
More informationFinite Element Analysis of Hybrid Excitation Axial Flux Machine for Electric Cars
223 Finite Element Analysis of Hybrid Excitation Axial Flux Machine for Electric Cars Pelizari, A. ademir.pelizari@usp.br- University of Sao Paulo Chabu, I.E. ichabu@pea.usp.br - University of Sao Paulo
More informationDesign and Analysis of Interior Permanent Magnet Synchronous Motor Considering Saturated Rotor Bridge using Equivalent Magnetic Circuit
Journal of Magnetics 19(4), 404-410 (2014) ISSN (Print) 1226-1750 ISSN (Online) 2233-6656 http://dx.doi.org/10.4283/jmag.2014.19.4.404 Design and Analysis of Interior Permanent Magnet Synchronous Motor
More information1439. Numerical simulation of the magnetic field and electromagnetic vibration analysis of the AC permanent-magnet synchronous motor
1439. Numerical simulation of the magnetic field and electromagnetic vibration analysis of the AC permanent-magnet synchronous motor Bai-zhou Li 1, Yu Wang 2, Qi-chang Zhang 3 1, 2, 3 School of Mechanical
More informationComparative investigation of permanent magnet linear oscillatory actuators used in orbital friction vibration machine
International Journal of Applied Electromagnetics and Mechanics 45 (214) 581 588 581 DOI 1.3233/JAE-14188 IOS Press Comparative investigation of permanent magnet linear oscillatory actuators used in orbital
More informationHigh Efficiency LSM with High Flux Density for Transportation
Journal of Transportation Technologies,,, -6 doi:.436/jtts..43 Published Online October (http://www.scirp.org/journal/jtts) High Efficiency LSM with High Flux Density for Transportation Abstract Nobuo
More informationPermanent Magnet Wind Generator Technology for Battery Charging Wind Energy Systems
Permanent Magnet Wind Generator Technology for Battery Charging Wind Energy Systems Casper J. J. Labuschagne, Maarten J. Kamper Electrical Machines Laboratory Dept of Electrical and Electronic Engineering
More informationUJET VOL. 2, NO. 2, DEC Page 8
UMUDIKE JOURNAL OF ENGINEERING AND TECHNOLOGY (UJET) VOL. 2, NO. 2, DEC 2016 PAGE 8-15 FINITE ELEMENT ANALYSIS OF A 7.5KW ASYNCHRONOUS MOTOR UNDER INTERMITTENT LOADING. Abunike, E. C. and Okoro, O. I.
More informationConcept Design and Performance Analysis of HTS Synchronous Motor for Ship Propulsion. Jin Zou, Di Hu, Mark Ainslie
Concept Design and Performance Analysis of HTS Synchronous Motor for Ship Propulsion Jin Zou, Di Hu, Mark Ainslie Bulk Superconductivity Group, Engineering Department, University of Cambridge, CB2 1PZ,
More informationStatic Characteristics of Switched Reluctance Motor 6/4 By Finite Element Analysis
Australian Journal of Basic and Applied Sciences, 5(9): 1403-1411, 2011 ISSN 1991-8178 Static Characteristics of Switched Reluctance Motor 6/4 By Finite Element Analysis 1 T. Jahan. 2 M.B.B. Sharifian
More informationAnalysis and Experiments of the Linear Electrical Generator in Wave Energy Farm utilizing Resonance Power Buoy System
Journal of Magnetics 18(3), 250-254 (2013) ISSN (Print) 1226-1750 ISSN (Online) 2233-6656 http://dx.doi.org/10.4283/jmag.2013.18.3.250 Analysis and Experiments of the Linear Electrical Generator in Wave
More informationExperimental Tests and Efficiency Improvement of Surface Permanent Magnet Magnetic Gear
IEEJ Journal of Industry Applications Vol.3 No.1 pp.62 67 DOI: 10.1541/ieejjia.3.62 Paper Experimental Tests and Efficiency Improvement of Surface Permanent Magnet Magnetic Gear Michinari Fukuoka a) Student
More informationPublication P Institute of Electrical and Electronics Engineers (IEEE)
Publication P2 Jere Kolehmainen and Jouni Ikäheimo. 2008. Motors with buried magnets for medium-speed applications. IEEE Transactions on Energy Conversion, volume 23, number 1, pages 86-91. 2008 Institute
More informationWater-Cooled Direct Drive Permanent Magnet Motor Design in Consideration of its Efficiency and Structural Strength
Journal of Magnetics 18(2), 125-129 (2013) ISSN (Print) 1226-1750 ISSN (Online) 2233-6656 http://dx.doi.org/10.4283/jmag.2013.18.2.125 Water-Cooled Direct Drive Permanent Magnet Motor Design in Consideration
More informationHybrid Excited Vernier Machines with All Excitation Sources on the Stator for Electric Vehicles
Progress In Electromagnetics Research M, Vol. 6, 113 123, 16 Hybrid Excited Vernier Machines with All Excitation Sources on the Stator for Electric Vehicles Liang Xu, Guohai Liu, Wenxiang Zhao *, and Jinghua
More informationON THE PARAMETERS COMPUTATION OF A SINGLE SIDED TRANSVERSE FLUX MOTOR
ON THE PARAMETERS COMPUTATION OF A SINGLE SIDED TRANSVERSE FLUX MOTOR Henneberger, G. 1 Viorel, I. A. Blissenbach, R. 1 Popan, A.D. 1 Department of Electrical Machines, RWTH Aachen, Schinkelstrasse 4,
More informationA Linear Motor Driver with HTS Levitation Techniques
Volume 1, Number 1, June 2007 Journal of Science, Technology and Engineering 34 A Linear Motor Driver with HTS Levitation Techniques Jian-Xun Jin a, You-Guang Guo b, and Jian-Guo Zhu b a Centre of Applied
More information4 Finite Element Analysis of a three-phase PM synchronous machine
Assignment 4 1-1 4 Finite Element Analysis of a three-phase PM synchronous machine The goal of the third assignment is to extend your understanding on electromagnetic analysis in FEM. This assignment is
More informationIEEE Transactions on Applied Superconductivity. Copyright IEEE.
Title Loss analysis of permanent magnet hybrid brushless machines with and without HTS field windings Author(s) Liu, C; Chau, KT; Li, W Citation The 21st International Conference on Magnet Technology,
More informationTHE INFLUENCE OF THE ROTOR POLE SHAPE ON THE STATIC EFICIENCY OF THE SWITCHED RELUCTANCE MOTOR
7 th INTERNATIONAL MULTIDISCIPLINARY CONFERENCE Baia Mare, Romania, May 17-18, 27 ISSN-1224-3264 THE INFLUENCE OF THE ROTOR POLE SHAPE ON THE STATIC EFICIENCY OF THE SWITCHED RELUCTANCE MOTOR Liviu Neamţ,
More informationAnalytical and numerical computation of the no-load magnetic field in induction motors
Analytical and numerical computation of the no-load induction motors Dan M. Ionel University of Glasgow, Glasgow, Scotland, UK and Mihai V. Cistelecan Research Institute for Electrical Machines, Bucharest
More informationCogging Torque Reduction in Surface-mounted Permanent Magnet Synchronous Motor by Axial Pole Pairing
EVS28 KINTEX, Korea, May 3-6, 215 Cogging Torque Reduction in Surface-mounted Permanent Magnet Synchronous Motor by Axial Pole Pairing Soo-Gyung Lee 1, Kyung-Tae Jung 1, Seung-Hee Chai 1, and Jung-Pyo
More informationCogging torque reduction of Interior Permanent Magnet Synchronous Motor (IPMSM)
Scientia Iranica D (2018) 25(3), 1471{1477 Sharif University of Technology Scientia Iranica Transactions D: Computer Science & Engineering and Electrical Engineering http://scientiairanica.sharif.edu Cogging
More informationAnalytical Model for Permanent Magnet Motors With Surface Mounted Magnets
386 IEEE TRANSACTIONS ON ENERGY CONVERSION, VOL. 18, NO. 3, SEPTEMBER 2003 Analytical Model for Permanent Magnet Motors With Surface Mounted Magnets Amuliu Bogdan Proca, Member, IEEE, Ali Keyhani, Fellow,
More informationROEVER COLLEGE OF ENGINEERING & TECHNOLOGY ELAMBALUR, PERAMBALUR DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING ELECTRICAL MACHINES I
ROEVER COLLEGE OF ENGINEERING & TECHNOLOGY ELAMBALUR, PERAMBALUR-621220 DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING ELECTRICAL MACHINES I Unit I Introduction 1. What are the three basic types
More informationAnalysis of Anti-Notch Method to the Reduction of the Cogging Torque in Permanent Magnet Synchronous Generator
International Journal of Scientific & Engineering Research, Volume 7, Issue 12, December-2016 1301 Analysis of Anti-Notch Method to the Reduction of the Cogging Torque in Permanent Magnet Synchronous Generator
More informationWave Energy Conversion
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology 232 Wave Energy Conversion Linear Synchronous Permanent Magnet Generator OSKAR DANIELSSON ACTA UNIVERSITATIS
More information338 Applied Electromagnetic Engineering for Magnetic, Superconducting, Multifunctional and Nano Materials
Materials Science Forum Online: 2014-08-11 ISSN: 1662-9752, Vol. 792, pp 337-342 doi:10.4028/www.scientific.net/msf.792.337 2014 Trans Tech Publications, Switzerland Torque Characteristic Analysis of an
More informationDesign and analysis of a HTS vernier PM machine. IEEE Transactions on Applied Superconductivity. Copyright IEEE.
Title Design and analysis of a HTS vernier PM machine Author(s) Li, J; Chau, KT Citation Ieee Transactions On Applied Superconductivity, 2010, v. 20 n. 3, p. 1055-1059 Issued Date 2010 URL http://hdl.handle.net/10722/129194
More informationAnalysis of Half Halbach Array Configurations in Linear Permanent-Magnet Vernier Machine
Journal of Magnetics 22(3), 414-422 (2017) ISSN (Print) 1226-1750 ISSN (Online) 2233-6656 https://doi.org/10.4283/jmag.2017.22.3.414 Analysis of Half Halbach Array Configurations in Linear Permanent-Magnet
More informationCitation Ieee Transactions On Magnetics, 2001, v. 37 n. 4 II, p
Title Design and analysis of a new doubly salient permanent magnet motor Author(s) Cheng, M; Chau, KT; Chan, CC Citation Ieee Transactions On Magnetics, 2001, v. 37 n. 4 II, p. 3012-3020 Issued Date 2001
More informationCPPM Mahine: A Synchronous Permanent Magnet Machine with Field Weakening
CPPM Mahine: A Synchronous Permanent Magnet Machine with Field Weakening Juan A. Tapia, Thomas A. Lipo, Fellow, IEEE Dept. of Electrical and Computer Engineering University of Wisconsin-Madison 45 Engineering
More informationDesigning an Efficient Permanent Magnet Generator for Outdoor Utilities İlhan Tarımer
Designing an Efficient Permanent Magnet Generator for Outdoor Utilities İlhan Tarımer Abstract This paper deals with designing, modelling and production process of a permanent magnet axial flux structured
More informationAnalytical Method for Predicting the Air-Gap Flux Density of Dual-Rotor Permanent- Magnet (DRPM) Machine
Analytical Method for Predicting the Air-Gap Flux Density of Dual-Rotor Permanent- Magnet (DRPM) Machine W.Xie, G.Dajaku*, D.Gerling Institute for Electrical Drives and Actuators, University of Federal
More informationOuter rotor eddy current heater for wind turbines
Renew. Energy Environ. Sustain. 1, 25 (2016) T. Tudorache and L. Melcescu, published by EDP Sciences, 2016 DOI: 10.1051/rees/2016026 Available online at: http://www.energy-sustainability.org/ RESEARCH
More informationEffect of Reaction Plate on Performance of Single-Side Linear Induction Motor in Different Speeds and Frequencies with Finite Element Method
Effect of Reaction Plate on Performance of Single-Side Linear Induction Motor in Different Speeds and Frequencies with Finite Element Method O. Maktabdar MSC Student, University of Birjand, Birjand, Iran,
More informationRegular paper. Design and FE Analysis of BLDC Motor for Electro- Mechanical Actuator
P.Srinivas* J. Electrical Systems 11-1 (2015): 76-88 Regular paper Design and FE Analysis of BLDC Motor for Electro- Mechanical Actuator JES Journal of Electrical Systems This paper presents the design
More informationShanming Wang, Ziguo Huang, Shujun Mu, and Xiangheng Wang. 1. Introduction
Mathematical Problems in Engineering Volume 215, Article ID 467856, 6 pages http://dx.doi.org/1.1155/215/467856 Research Article A Straightforward Convergence Method for ICCG Simulation of Multiloop and
More informationTorque Ripple Reduction Using Torque Compensation Effect of an Asymmetric Rotor Design in IPM Motor
Journal of Magnetics 22(2), 266-274 (2017) ISSN (Print) 1226-1750 ISSN (Online) 2233-6656 https://doi.org/10.4283/jmag.2017.22.2.266 Torque Ripple Reduction Using Torque Compensation Effect of an Asymmetric
More informationDesign and analysis of Axial Flux Permanent Magnet Generator for Direct-Driven Wind Turbines
Design and analysis of Axial Flux Permanent Magnet Generator for Direct-Driven Wind Turbines Sung-An Kim, Jian Li, Da-Woon Choi, Yun-Hyun Cho Dep. of Electrical Engineering 37, Nakdongdae-ro, 55beon-gil,
More informationA Simple Nonlinear Model of the Switched Reluctance Motor
IEEE TRANSACTIONS ON ENERGY CONVERSION, VOL 15, NO 4, DECEMBER 2000 395 A Simple Nonlinear Model of the Switched Reluctance Motor Vladan Vujičić and Slobodan N Vukosavić Abstract The paper presents a simple
More informationNormal Force and Vibration Analysis of Linear Permanent-Magnet Vernier Machine
Journal of Magnetics 22(4), 579-589 (207) ISSN (Print) 226-750 ISSN (Online) 22-6656 https://doi.org/0.428/jmag.207.22.4.579 Normal Force and Vibration Analysis of Linear Permanent-Magnet Vernier Machine
More informationFlux: Examples of Devices
Flux: Examples of Devices xxx Philippe Wendling philippe.wendling@magsoft-flux.com Create, Design, Engineer! www.magsoft-flux.com www.cedrat.com Solenoid 2 1 The Domain Axisymmetry Open Boundary 3 Mesh
More informationDesign of a high-speed superconducting bearingless machine for flywheel energy storage systems. Li, WL; Chau, KT; Ching, TW; Wang, Y; CHEN, M
Title Design of a high-speed superconducting bearingless machine for flywheel energy storage systems Author(s) Li, WL; Chau, KT; Ching, TW; Wang, Y; CHEN, M Citation IEEE Transactions on Applied Superconductivity,
More information3 d Calculate the product of the motor constant and the pole flux KΦ in this operating point. 2 e Calculate the torque.
Exam Electrical Machines and Drives (ET4117) 11 November 011 from 14.00 to 17.00. This exam consists of 5 problems on 4 pages. Page 5 can be used to answer problem 4 question b. The number before a question
More informationOptimal Design of PM Axial Field Motor Based on PM Radial Field Motor Data
Optimal Design of PM Axial Field Motor Based on PM Radial Field Motor Data GOGA CVETKOVSKI LIDIJA PETKOVSKA Faculty of Electrical Engineering Ss. Cyril and Methodius University Karpos II b.b. P.O. Box
More informationTorque Performance and Permanent Magnet Arrangement for Interior Permanent Magnet Synchronous Motor
Extended Summary pp.954 960 Torque Performance and Permanent Magnet Arrangement for Interior Permanent Magnet Synchronous Motor Naohisa Matsumoto Student Member (Osaka Prefecture University, matumoto@eis.osakafu-u.ac.jp)
More informationModeling and Design Optimization of Permanent Magnet Linear Synchronous Motor with Halbach Array
Modeling and Design Optimization of Permanent Magnet Linear Synchronous Motor with Halbach Array N. Roshandel Tavana, and A. Shoulaie nroshandel@ee.iust.ir, and shoulaie@ee.iust.ac.ir Department of Electrical
More informationProject 1: Analysis of an induction machine using a FEM based software EJ Design of Electrical Machines
Project : Analysis of an induction machine using a FEM based software General instructions In this assignment we will analyze an induction machine using Matlab and the freely available finite element software
More informationStatic Analysis of 18-Slot/16-Pole Permanent Magnet Synchronous Motor Using FEA
International Journal of Engineering and Technology Volume 5 No. 3,March, 2015 Static Analysis of 18-Slot/16-Pole Permanent Magnet Synchronous Motor Using FEA M. Rezal 1, Dahaman Ishak 2, M. Sabri 1, Al-Hapis
More informationEffect of the number of poles on the acoustic noise from BLDC motors
Journal of Mechanical Science and Technology 25 (2) (211) 273~277 www.springerlink.com/content/1738-494x DOI 1.17/s1226-1-1216-4 Effect of the number of poles on the acoustic noise from BLDC motors Kwang-Suk
More informationAXIAL FLUX INTERIOR PERMANENT MAGNET SYNCHRONOUS MOTOR WITH SINUSOIDALLY SHAPED MAGNETS
AXIAL FLUX INTERIOR PERMANENT MAGNET SYNCHRONOUS MOTOR WITH SINUSOIDALLY SHAPED MAGNETS A. Parviainen, J. Pyrhönen, M. Niemelä Lappeenranta University of Technology, Department of Electrical Engineering
More informationCogging Torque Reduction in Surface-mounted Permanent Magnet Synchronous Motor by Axial Pole Pairing
EVS28 KINTEX, Korea, May 3-6, 215 Cogging Torque Reduction in Surface-mounted Permanent Magnet Synchronous Motor by Axial Pole Pairing Soo-Gyung Lee 1, Kyung-Tae Jung 1, Seung-Hee Chai 1, and Jung-Pyo
More informationDr. N. Senthilnathan (HOD) G. Sabaresh (PG Scholar) Kongu Engineering College-Perundurai Dept. of EEE
Design and Optimization of 4.8kW Permanent MagNet Brushless Alternator for Automobile G. Sabaresh (PG Scholar) Kongu Engineering College-Perundurai Dept. of EEE sabareshgs@gmail.com 45 Dr. N. Senthilnathan
More informationSimplified Analysis Technique for Double Layer Non-overlap Multiphase Slip Permanent Magnet Couplings in Wind Energy Applications
Simplified Analysis Technique for Double Layer Non-overlap Multiphase Slip Permanent Magnet Couplings in Wind Energy Applications Petrus JJ van Wyk - Prof. Maarten J. Kamper Renewable Energy Postgraduate
More informationRevision Guide for Chapter 15
Revision Guide for Chapter 15 Contents Revision Checklist Revision otes Transformer...4 Electromagnetic induction...4 Lenz's law...5 Generator...6 Electric motor...7 Magnetic field...9 Magnetic flux...
More informationProposal of C-core Type Transverse Flux Motor for Ship Propulsion Increasing Torque Density by Dense Stator Configuration
ADVANCED ELECTROMAGNETICS, Vol., No., December 01 Proposal of C-core Type Transverse Flux Motor for Ship Propulsion Increasing Torque Density by Dense Stator Configuration Yuta Yamamoto 1 *, Takafumi Koseki
More informationRevision Guide for Chapter 15
Revision Guide for Chapter 15 Contents tudent s Checklist Revision otes Transformer... 4 Electromagnetic induction... 4 Generator... 5 Electric motor... 6 Magnetic field... 8 Magnetic flux... 9 Force on
More informationDevelopment of axial flux HTS induction motors
Available online at www.sciencedirect.com Procedia Engineering 35 (01 ) 4 13 International Meeting of Electrical Engineering Research ENIINVIE-01 Development of axial flux HTS induction motors A. González-Parada
More informationInfluence of different rotor magnetic circuit structure on the performance. permanent magnet synchronous motor
ARCHIVES OF ELECTRICAL ENGINEERING VOL. 66(3), pp. 583-594 (2017) DOI 10.1515/aee-2017-0044 Influence of different rotor magnetic circuit structure on the performance of permanent magnet synchronous motor
More informationThis is a repository copy of Analysis and design optimization of an improved axially magnetized tubular permanent-magnet machine.
This is a repository copy of Analysis and design optimization of an improved axially magnetized tubular permanent-magnet machine. White Rose Research Online URL for this paper: http://eprints.whiterose.ac.uk/827/
More informationParameter Prediction and Modelling Methods for Traction Motor of Hybrid Electric Vehicle
Page 359 World Electric Vehicle Journal Vol. 3 - ISSN 232-6653 - 29 AVERE Parameter Prediction and Modelling Methods for Traction Motor of Hybrid Electric Vehicle Tao Sun, Soon-O Kwon, Geun-Ho Lee, Jung-Pyo
More informationEFFECT OF NUMBER OF ROTOR POLES ON AC LOSSES OF PERMANENT MAGNET MACHINES HAVING TWO SEPARATE STATORS
Nigerian Journal of Technology (NIJOTECH) Vol. 36, No. 4, October 217, pp. 1145 1149 Copyright Faculty of Engineering, University of Nigeria, Nsukka, Print ISSN: 331-8443, Electronic ISSN: 2467-8821 www.nijotech.com
More informationSTAR-CCM+ and SPEED for electric machine cooling analysis
STAR-CCM+ and SPEED for electric machine cooling analysis Dr. Markus Anders, Dr. Stefan Holst, CD-adapco Abstract: This paper shows how two well established software programs can be used to determine the
More informationA new hybrid method for the fast computation of airgap flux and magnetic forces in IPMSM
2017 Twelfth International Conference on Ecological Vehicles and Renewable Energies (EVER) A new hybrid method for the fast computation of airgap flux and magnetic forces in IPMSM Emile Devillers, Michel
More informationUnified Torque Expressions of AC Machines. Qian Wu
Unified Torque Expressions of AC Machines Qian Wu Outline 1. Review of torque calculation methods. 2. Interaction between two magnetic fields. 3. Unified torque expression for AC machines. Permanent Magnet
More informationLoss Minimization Design Using Magnetic Equivalent Circuit for a Permanent Magnet Synchronous Motor
Loss Minimization Design Using Magnetic Equivalent Circuit for a Permanent Magnet Synchronous Motor Daisuke Sato Department of Electrical Engineering Nagaoka University of Technology Nagaoka, Niigata,
More informationRobust optimal design of a magnetizer to reduce the harmonic components of cogging torque in a HDD spindle motor
Microsyst Technol (2014) 20:1497 1504 DOI 10.1007/s00542-014-2153-4 Technical Paper Robust optimal design of a magnetizer to reduce the harmonic components of cogging torque in a HDD spindle motor Changjin
More informationDesign, analysis and fabrication of linear permanent magnet synchronous machine
Design, analysis and fabrication of linear permanent magnet synchronous machine Monojit Seal Dept. of Electrical Engineering, IIEST, Shibpur, Howrah - 711103 W.B., India. email: seal.monojit@gmail.com
More informationDESIGN FEATURES AND GOVERNING PARAMETERS OF LINEAR INDUCTION MOTOR
CHAPTER 5 DESIGN FEATURES AND GOVERNING PARAMETERS OF LINEAR INDUCTION MOTOR 5.1 Introduction To evaluate the performance of electrical machines, it is essential to study their electromagnetic characteristics.
More informationNonlinear Electrical FEA Simulation of 1MW High Power. Synchronous Generator System
Nonlinear Electrical FEA Simulation of 1MW High Power Synchronous Generator System Jie Chen Jay G Vaidya Electrodynamics Associates, Inc. 409 Eastbridge Drive, Oviedo, FL 32765 Shaohua Lin Thomas Wu ABSTRACT
More information2577. The analytical solution of 2D electromagnetic wave equation for eddy currents in the cylindrical solid rotor structures
2577. The analytical solution of 2D electromagnetic wave equation for eddy currents in the cylindrical solid rotor structures Lale T. Ergene 1, Yasemin D. Ertuğrul 2 Istanbul Technical University, Istanbul,
More informationTRACING OF MAXIMUM POWER DENSITY POINT FOR AXIAL FLUX TORUS TYPE MACHINES USING GENERAL PURPOSE SIZING EQUATIONS
TRACING OF MAXIMUM POWER DENSITY POINT FOR AXIAL FLUX TORUS TYPE MACHINES USING GENERAL PURPOSE SIZING EQUATIONS M. Ramanjaneyulu Chowdary Dr.G.S Raju Mr.V.Rameshbabu M.Tech power electronics Former BHU
More informationTorque Analysis of Permanent Magnet Hybrid Stepper Motor using Finite Element Method for Different Design Topologies
International Journal of Power Electronics and Drive System (IJPEDS) Vol.2, No.1, March 212, pp. 17~116 ISSN: 288-8694 17 Torque Analysis of Permanent Magnet Hybrid Stepper Motor using Finite Element Method
More informationSHAPE DESIGN OPTIMIZATION OF INTERIOR PERMANENT MAGNET MOTOR FOR VIBRATION MITIGATION USING LEVEL SET METHOD
International Journal of Automotive Technology, Vol. 17, No. 5, pp. 917 922 (2016) DOI 10.1007/s12239 016 0089 7 Copyright 2016 KSAE/ 092 17 pissn 1229 9138/ eissn 1976 3832 SHAPE DESIGN OPTIMIZATION OF
More informationOptimum design of a double-sided permanent magnet linear synchronous motor to minimize the detent force
Energy Equip. Sys./ Vol. 5/No1/March 2017/ 1-11 Energy Equipment and Systems http://energyequipsys.ut.ac.ir www.energyequipsys.com Optimum design of a double-sided permanent magnet linear synchronous motor
More informationTransverse Flux Permanent Magnet Generator for Ocean Wave Energy Conversion
Transverse Flux Permanent Magnet Generator for Ocean Wave Energy Conversion José Lima, Anabela Pronto, and Mário Ventim Neves Faculdade de Ciências e Tecnologia Universidade Nova de Lisboa, Quinta da Torre,
More informationANALYTICAL COMPUTATION OF RELUCTANCE SYN- CHRONOUS MACHINE INDUCTANCES UNDER DIF- FERENT ECCENTRICITY FAULTS
Progress In Electromagnetics Research M, Vol. 24, 29 44, 2012 ANALYTICAL COMPUTATION OF RELUCTANCE SYN- CHRONOUS MACHINE INDUCTANCES UNDER DIF- FERENT ECCENTRICITY FAULTS H. Akbari * Department of Electrical
More information